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63.将①处翻译成汉语： ________________________________________________________________ 64.将②处改为同义句。 Dreams are __________ short ___________ old films. 65.根据③处完成下列句子。 If we sleep __________ ,our dreams will be ______ _________ . D The population problem may be the greatest one of the world today.The world's population is growing faster and faster.Two thousand years ago,there were only 250 million people on the earth.Four hundred years ago,the number was over 500million.But at the beginning of the twentieth century,the world's population was about 1,700 million.In 1970,this number was 3,600 million.In 1990, the number was five billion.A UN report said that the world population had passed six billion by the end of the 20th century.This was just ten years after it reached five billion.People say that by the year 2010,it may be seven billion. 阅读下面短文，完成表格，每空两词。 TimeWorld's population 2,000 years agoThere were only 250 million people on the earth. 400 years agoThe number was (66) _______ 500 million. At the beginning of (67)___________ centuryThe world's population was about 1,700 million. By the end of the 20th centuryA UN report said that the world population had passed (68 )________ . By the year 2010It (69 )_________seven billion (责任编辑：admin) |